Pattern Recognition - 61

Find out the next two numbers in the series.

13, 57, 911, 1315, 1719


Source: Internet


Answer

13, 57, 911, 1315, 1719,_,_,......

1,     5,     9,     13,   17, _ , _ ,......
   +4   +4     +4    +4

3,     7,     11,    15 ,  19, _ , _ ,......
   +4    +4     +4    +4

Next two numbers 21 23
                             25 27

13, 57, 911, 1315, 1719, 2123 ,2527 ,......